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Bio Lab 7.3
Vocab words for KU Bio 106 Lab
13
Zoology
Undergraduate 2
09/16/2017

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Term
Metridium
Definition
common North Atlantic sea anemone
Term
tentacles
Definition
defense and prey capture
Term
mouth
Definition
ingestion of food and elimination of indigestible particles (egestion)
Term
oral disc
Definition
raised portion of the mouth (equivalent to the hypostome of hydrozoans)
Term
gonads
Definition

organs for sexual reproduction

 

gametes are released into the gastric pouches and exit the body through the mouth

Term
ostium
Definition
pore that allows circulation of fluids between adjacent body sections
Term
pharynx
Definition
muscular portion of the gastrovascular cavity for pulling prey inward and expelling indigestible particles
Term
retractor muscles
Definition
expand and contract the body
Term
gastrovascular cavity
Definition
specialized chamber for extracellular digestion of prey
Term
primary septum
Definition
one of six thin vertical walls that divides body into sections, providing support and increased surface area for digestion
Term
secondary septum
Definition
one of several thin incomplete vertical walls that further subdivides body, providing support and increased surface area for digestion
Term
pedal disc
Definition
tough, fleshy base that attaches organism to rocks or sandy ocean floor

most anemones can use their pedal discs to move slowly, gliding along the ocean floor
Term
acontia
Definition
contain cnidocytes and may be extended through the mouth to aid in subduing live prey or to provide additional defense against predetors
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